On the central meridian, shapes are not distorted, but elsewhere they are.
The scale is also true on the central meridian of the projection.
They are accurate to around a millimeter within 3,000 km of the central meridian.
The central meridian of the first zone was the Washington meridian.
Near the central meridian the differences are small but measurable.
On the central meridian and the standard latitude shapes are not distorted.
The central (2 W) meridian is shown in red.
Pseudocylindrical projections represent the central meridian as a straight line segment.
Things along the central meridian, and at right angles to it, are not distorted.
The projection is conformal with a constant scale on the central meridian.